Cholera: In the fight against the plague and cholera, which had mostly been brought in from Asia, many quarantine cordons were erected at the Turkish border in the 15th century. In 1830 cholera was brought to Lower Austria from Russia via Galicia, reaching its peak in Vienna in the autumn of 1831. Before it ended in 1832 it claimed 2000 victims in Vienna; Tyrol was not affected due to a medical cordon. One consequence of the epidemic was that the sewage system in Vienna was improved. Many civilian people in the northern parts of Lower Austria, Bohemia and Moravia were the victims of cholera 1866, after being infected by Prussian troops.